patch 9.0.0159: cannot build with small features

Problem:    Cannot build with small features.
Solution:   Check for E1170 only with FEAT_EVAL.
diff --git a/src/version.c b/src/version.c
index 0a39e5d..813ff63 100644
--- a/src/version.c
+++ b/src/version.c
@@ -736,6 +736,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    159,
+/**/
     158,
 /**/
     157,